Fluororesin and molded object

Abstract

A fluororesin including a vinylidene fluoride unit and a tetrafluoroethylene unit. The fluororesin has a gas chromatography-mass spectrometry total ion chromatogram including a peak which is assigned to a component having a molecular weight of 202 to 903 and which has a peak intensity of 1000 or lower. Also disclosed is a molded article formed from the fluororesin.

The invention claimed is: 
     
       1. A fluororesin comprising:
 a vinylidene fluoride unit; and 
 a tetrafluoroethylene unit, 
 the fluororesin having a gas chromatography-mass spectrometry total ion chromatogram including a peak which is assigned to a component having a molecular weight of 202 to 903 and which has a peak intensity of 500 or lower. 
 
     
     
       2. The fluororesin according to  claim 1 ,
 wherein the vinylidene fluoride unit represents 10.0 to 70.0 mol % of all monomer units constituting the fluororesin, and 
 the tetrafluoroethylene unit represents 30.0 to 85.0 mol % of all monomer units constituting the fluororesin. 
 
     
     
       3. The fluororesin according to  claim 1 , further comprising
 an ethylenically unsaturated monomer unit of at least one ethylenically unsaturated monomer selected from the group consisting of ethylenically unsaturated monomers represented by the following formula (1):
   CX 11 X 12 ═CX 13  (CX 14 X 15 ) n11 X 16  
 
 
 
       wherein X 11  to X 16  are the same as or different from each other, and are each H, F, or Cl; and n 11  is an integer of 0 to 8, excluding tetrafluoroethylene and vinylidene fluoride; and
 ethylenically unsaturated monomers represented by the following formula (2):
   CX 21 X 22 ═CX 23 —O(CX 24 X 25 ) n21 X 26  
 
 
 
       wherein X 21  to X 26  are the same as or different from each other, and are each H, F, or Cl; and n 21  is an integer of 0 to 8,
 wherein the vinylidene fluoride unit represents 10.0 to 49.9 mol % of all monomer units constituting the fluororesin, 
 the tetrafluoroethylene unit represents 50.0 to 85.0 mol % of all monomer units constituting the fluororesin, and 
 the ethylenically unsaturated monomer unit represents 0.1 to 5.0 mol % of all monomer units constituting the fluororesin. 
 
     
     
       4. A molded article comprising the fluororesin according to  claim 1 .